This page explains how Michael Gopin (USATT# 70476)'s rating went from 1617 to 1613 at the 2013 Fall Open held on - 9 Nov 2013. The links below take you to pages that describe various aspects of the rating processor.

The rating processor goes through 4 passes in order. The links take you to pages that provide detailed explanations of the calculations during each of the 4 passes.